Matlab reads file with different order

>> fid = fopen('RQ_par.txt');
>> fs = fscanf( fid, '%f' )
fs =
       0.9011
        0.848
       0.6744
         0.54
       1.4457
         1.18
>> fclose(fid);

This shows how the numbers are stored in a sequence in the file on the disk. Then the reading function "decides" what are rows and what are columns. Matlab is "column major". C is row major.

Two better alternatives to read your file with R2018b are

>> dlmread('RQ_par.txt') 
ans =
       0.9011        0.848
       0.6744         0.54
       1.4457         1.18
>> rq = load('RQ_par.txt')
rq =
       0.9011        0.848
       0.6744         0.54
       1.4457         1.18
>> 

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per isakson 2020-9-1

编辑：per isakson 2020-9-1

Read my answer and my comments once more. I cannot explain better.

chntua chntua 2020-9-1

okay thanks a lot for your time !

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更多回答（1 个）

John D'Errico 2020-8-31

0
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Must I point out the data in that file are arranged as:

data = textread('RQ_par.txt')
data =
                    0.9011                     0.848
                    0.6744                      0.54
                    1.4457                      1.18

MATLAB will read in each line, one at a time. That is how the file is set up.

If you want to change the order to a different order, it is not how you read the file in, but how you perform the re-arrangment.

data = reshape(data',3,2)
data =
                    0.9011                      0.54
                     0.848                    1.4457
                    0.6744                      1.18